Journal of Technologic Dentistry (대한치과기공학회지)
- Volume 31 Issue 1
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- Pages.23-36
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- 2009
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- 1229-3954(pISSN)
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- 2288-5218(eISSN)
The Effect of Repeated Firing on the Color Difference of a Metal-Ceramic System with Different Porcelain Powder
다른 특성을 가지는 도재가 반복소성에 따라 색조변화에 미치는 영향
- Hwang, Jae-Sun (Department of Dental Laboratory Technology, Dongnam Health College)
- 황재선 (동남보건대학 치기공과)
- Published : 2009.03.31
Abstract
The goal of esthetic restoration is to achieve morphologic, optical, and biologic acceptance. Creation of a natural looking ceramic restoration, which blends harmoniously with surrounding dentition, is not always achieved. A successful color match is an important aspect of any esthetic dental restoration. Since natural enamel has inherent translucency, it is important that ceramic restorations reproduce the translucency and color of the natural teeth. However, the final color match of porcelain crowns to adjacent natural dentition remains some problem. Difficulties related to color matching arise from the structural differences that exist between metal ceramic crowns and natural teeth, the limited range of available ceramic shades, inadequate shade guides, different types of metal alloys, repeated firing, the condensation technique, and varying compositions of ceramic materials. Many factors contribute to the esthetic success of dental restoration: optical properties such as color and its elements of hue, value, and chroma; translucency and opacity; light transmission and scattering; and metamerism and fluorescence. The purpose of this study was to determine the color changes of metal-ceramic system with different veneering porcelain powder after repeated firing. The objectives of this in vitro study were to measure the lightness(